Chapter 7 (Computer Networks)

Question 1

What is Network Protocol?

Answer 1

These are basically set of rules which computers make use of when they communicate with each other over a network.

Question 2

What does a Network Communication Protocol do?

Answer 2

A network communication protocol is a standard method for transmitting data from one computer to another across a network.

Question 3

Explain what is meant by an “intranet”

Answer 3

Private computer network
Using Internet protocols/IP
To share company information/data/files securely

Question 4

Identify the protocols that would be used on an intranet and state a different use for each.

Answer 4

FTP/file transfer protocol-for uploading data/files/pages to web server
HTTP/hypertext transfer protocol-for accessing web pages
HTTPS/hypertext transfer protocol secure-for secure data transfer
SMTP-for email
IMAP-for email
TCP/IP-for packet transmission
SSH-for secure access

Question 5

Name the benefits to the company of having an intranet

Answer 5

Can access company documents from anywhere in company (as and when needed)
Increase in workforce productivity as employees can locate company documents/templates/data (using web browser)
No need to send/produce hardcopy to every employee
…can use email/instant messaging between employees
Increase in collaboration between employees
…with all information available, saving time
Company/corporate knowledge/information easily updated sent to/available to all employee

Question 6

Name the steps that a customer would take when using a website to book a room in a
hotel for a holiday

Answer 6

Search for hotels in Brazil/example of search
Choose language
Select dates start/end date/duration of stay
Select number of rooms
Select number of occupants
Select facilities/options
Enter personal details such as home/contact details
Enter payment details credit/debit card to guarantee/pay for rooms

Question 7

What are the problems that a disabled person might have when using an online booking system.

Answer 7

Physically disabled people could have difficulty in using mouse/keyboard…for site navigation
Visually impaired with difficulty in reading text…due to, e.g. font
Visually impaired with difficulty in understanding images
…due to colour/contrast
Hearing impaired with difficulty in following commentaries/audio instructions/movie or video soundtracks
…e.g. speed of information flow/background noise levels

Question 8

Explain what is meant by “video-on-demand”

Answer 8

Streamed/downloaded video/audio content from remote server
Distributed by IPTV over a network
Use of menu to select content
Viewer can watch/listen at their own convenience/when they want to

Question 9

Describe what is meant by “WiFi”

Answer 9

Wireless fidelity
Wireless networking
Using radio waves
Use of shared spectrum/different frequency
Requires wireless NIC